Photocopying – Contact printing – Light boxes
Patent
1993-11-15
1995-03-14
Smith, Matthew S.
Photocopying
Contact printing
Light boxes
355271, G03G 1514
Patent
active
053981073
ABSTRACT:
An electrophotographic print engine includes a photoconductor drum (20) that interfaces with a transfer drum (48) to form a transfer nip therebetween. Paper is disposed in a paper feed path (242) for traversal through the nip between two precurl rollers (242) and (244). The durometers of the two rollers (242) and (244) are different, such that one roller will cause the other to compress. This causes the paper to have a curvature bias in the direction of the curvature of the drum (48). The paper is then fed into an attachment nip formed between an attachment roller (198) and the drum (48). The paper is adhered thereto by electrostatic forces with the curvature of the paper allowing smaller forces to be utilized. In a multi-color print operation, the paper is maintained on the drum (48) for a number of passes until all images have been transferred thereto from the drum (20). A picker (248) then extracts the paper from the drum (48) and feeds it into a fuser mechanism. The fuser mechanism has two rollers (256) and (258) which apply a curvature bias in the opposite direction to that provided by the precurl rollers (244) and (246) to return the paper to a substantially planar conformation.
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Bartholmae Jack N.
Tompkins E. Neal
Howison Gregory M.
Smith Matthew S.
T R Systems, Inc.
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